404 on single posts after moving single site into multisite

Hi guys

I recently began moving some client's sites from there existing single WP installs into my multisite to reduce the amount of admin for myself and I have just noticed that one I did today is giving a 404 on single posts and categories too..Pages are fine

I have tried changing/flushing the permalinks from inside the "edit site" settings (network admin) but no joy.

OK, I got it sorted.. In case anyone else stumbles across this post with the same problem, here's what it was for me:

The site was moved from it's single site install into a multisite network using the incredible Snapshot plugin..
The theme being used is pretty old and is a child theme for Thematic.
Looking in appearance > themes, I could only see the child theme and 2016, no Thematic.
As network admin, I went into 'edit site > themes' and enabled both Thematic and the child theme (that was disabled even though the site was using it?!), now they both show up in the themes menu within the site.
I then switched to Twenty Sixteen theme and back to the original child theme and bingo, all sorted :slight_smile:

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